Rear bumper for an automobile



FIG. 1 is a front perspective view of a rear bumper for an automobile showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof (a left side elevational view thereof is symmetrical thereto); and

FIG. 7 is a cross-sectional view taken along line VII--VII of FIG. 2. 

The ornamental design for a rear bumper for an automobile, as shown and described. 